It is currently Sat Sep 22, 2018 2:18 am

 All times are UTC - 5 hours [ DST ]

 Page 1 of 1 [ 1 post ]
 Print view Previous topic | Next topic
Author Message
 Post subject: GMAT Speed / Distance / TimePosted: Fri Jul 22, 2011 2:40 pm

Joined: Sun May 30, 2010 2:23 am
Posts: 498
Alex leaves Atlanta heading directly toward Philadelphia at 8:00 a.m., traveling at 50 miles per hour. Heidi leaves Philadelphia, 600 miles away, heading directly for Atlanta at the same time, traveling at 70 miles per hour. At what time will they pass each other?

A. 1 p.m.
B. 2 p.m.
C. 2:45 p.m.
D. 3 p.m.
E. 3:30 p.m.

1) The distance between Atlanta and Philadelphia is 600 miles.

2) Heidi starts in Philadelphia and Alex starts in Atlanta, both at the same time, 8:00 a.m. Alex travels at 50 miles per hour, while Heidi travels at 70 miles per hour.

3) After T hours they met. The formula for distance is speed × time = distance. Therefore Alex drove 50T miles, while Heidi traveled 70T miles.

4) The sum of the distances they travelled is the whole distance between Atlanta and Philadelphia. So we have the following equation:
50T + 70T = 600
120T = 600
T = 5

5) 8:00 a.m. + 5 hours = 1:00 p.m.

Top

 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Page 1 of 1 [ 1 post ]

 All times are UTC - 5 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 1 guest

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum

Search for:
 Jump to:  Select a forum ------------------ GMAT    GMAT: Quantitative Section (Math)    GMAT: Verbal Section    GMAT: Integrated Reasoning    GMAT: General Questions GRE    GRE: Quantitative Reasoning (Math)    GRE: Verbal Reasoning    GRE: General Questions General questions    Other questions